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Finding the Fourth Proportional to 216,425.40, 298,621.74 and 126,953.40

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Solution

The fourth proportional to 216,425.40, 298,621.74 and 126,953.40 is: 175,169.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,425.40 : 298,621.74 = 126,953.40 : x
  2. Step 2: Convert to fraction form
    216,425.40/298,621.74 = 126,953.40/x
  3. Step 3: Cross multiply
    216,425.40x = 298,621.74 × 126,953.40
  4. Step 4: Simplify right side
    216,425.40x = 37,911,045,206.92
  5. Step 5: Solve for x
    x = 37,911,045,206.92/216,425.40
  6. Step 6: Final answer
    x = 175,169.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.